You would say, "An eternity."
a eternity is a lifetime
Eternity is a noun.
infinity
Eternity - comics - was created in 1965.
The philosophical theory of eternity is the idea that time is a constant and unchanging aspect of reality. It suggests that past, present, and future all exist simultaneously, rather than time being a linear progression. This theory considers eternity to be a higher, unchanging reality beyond our temporal experience.
And Eternity was created in 1990-01.
The ISBN of And Eternity is 978-0688086886.
From Her to Eternity was created in -1983-10.
From Eternity to Here was created in 2010.
Fragile Eternity was created on 2009-04-21.
immortals have an eternity life